CVE-2026-112353 GFI KerioConnect < 10.0.8p2 Stored XSS via SVG Attachment
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-112353?
CVE-2026-112353 is a medium-severity vulnerability in GFI KerioConnect, published on 27 Oct 2026.
Official description
GFI KerioConnect (Kerio Connect) before 10.0.8 Patch 2 contains a stored cross-site scripting vulnerability in the Webmail component that allows a remote attacker to run JavaScript in a victim's authenticated Webmail session by uploading a crafted SVG email attachment that bypasses sanitization of event-handler attributes. Attackers can exploit the temporary-download endpoint's insufficient Content-Security-Policy sandbox to execute scripts when the attachment is opened, enabling theft of the victim's credentials and mailbox contents. Proofpoint Threat Research has observed exploitation in the wild as a credential and mailbox stealer.
Which versions are affected by CVE-2026-112353?
How do I fix CVE-2026-112353?
No fix has been published for CVE-2026-112353 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-112353 being exploited?
There is no known exploitation of CVE-2026-112353 in the wild and no public exploit code.
Sources
Also known as GHSA-x85g-q7vc-7jh7.